() . - .
Δt t1 t2 . Δt2 dt.
(12.5) [2]:
t = t1 + Δt + dt
(11.4) [2]: t1=
, - =5...10 . . : =10 =6 t1=16 .
Δt m. m = 40-60, m=60. (12.4) [2]: Δt =523/m 9
, . dt =36 , dt =3 .
t =16+9+3=28 .
P=3,8 . :
t2 = t1 + Δt =16+9=25 .
t, 0
t =28 0C
dt = 3 0C
t=16 0C
Q,/
.1.1 t,Q .
0= 12.75 , t0=485 oC, =3,8
-800-12.8-3 0.44 250 . n=50 1/.
- . .
. , 11 .
. , - . 6 . -1000-5.9/3 .
-800-12.8-3 8 (2 , 1 , 5 ). . ( 1 8).
. 1.2.